Traveling chain grate



Dec. 4, 1928.

J. VAN BRUNT TRAVELING CHAIN GRATE Filed July 4, 1925- I I!!!111Ill!!!lllllllllllllll/IIIIIIA.

f I INVENTOR' Jamv V/w Bnu/vr ATTORN .s'

Patented Dec. 4, 1928.

UNITED STATES FATE Fries.

Joni: VAN BRUNT, or FLUSHING, NEW YORK, Assrenon TO coMB sTIoNnnGInEEn me CORPORATION, or NEw oRK, N. Y.,/ A CORPORATION on NEW YORK.

TRAVELING CHAIN snare.

Application filed July 4,

well known, when a fire is banked in a grate of this character, as heretofore constructed, the portion of the grate bearing the hot coal becomes heated to such an extent that the supporting structure upon which the upper run of the grate rests is liable to become so weakened by over-heating as to cause the entire grate to sag.

The principal object of the present invention is to providea grate of the character above indicated in which the liability of damage caused by over-heating of the supporting structure of the grate is reduced to a minimum.

The following is a description of my invention reference being 'hadto the accompanying drawings, in which,

Figure 1 is a view in perspective, partly diagrammatical, of a portion of a traveling chain grate structure embodying features of the invention in their preferred form;

' Fig. 2 is a transverse sectional view on an enlarged scale, of the transverse girder shown in Fig. 1;

Figs. 3 and 4 are transverse sectional views of supporting beams or girders, on an enlarged scale, each girder constituting a component part of a supporting structure for the upper run of the grate, each view show- 0 ing a modified form.

The traveling chain grate structure illustrated in the drawings is provided with longitudinally extending side frames 2, a cross beam or girder 4 connecting the side frames, and one or more longitudinally extending beams or girders 6 arranged between the side frames and made in sections having their ad j acent ends abutting and secured to opposite sides of the cross girder 4. The girders 4 and 6 are I-shape in cross section, the flanges on the longitudinal edges of the girders being formed by angle irons 10 riveted or otherwise suitably secured to the longitudinal margins of the webs of the girders. A wall 12 is secured atits longitudinal edges on angle irons 14 secured to the side frames 2, respectively, and the wall is further secured to the bottom sides of the girders 4 and 6. The 'wall 12 constitutes the bottom wall of a wind box which is divided into separate compartgrate slides.

1923. Serial No. 649 390.-

ments by means of the girders 4, air-under pressure being supplied to the separate compartments in the usual manner. Wearing plates or skids 16 and 17 are mounted upon 1 the girder 6, and upon brackets or angle irons 20, respectively, secured to the side frames, upon which-the upper run 18 of the chain A similar wearing plate 22 is mounted on the top of the cross girder 4, this plate being made in sections so as to ex-, tend'between the plates 16 and 17. The longitudinal edges of the top surface of this wear ing plate 22 are rounded over so as not to interfere with the traverse of the grate across it. This wearing plate serves as a sealing plate between the two compartments of the wind box. 7 V v V In accordance with my invention, means is provided for heat insulating the girders 4 and 6 and the angle irons 20 from the heat ofthe fuel supporting members of the grate and the fuel supported thereby. In the construction illustrated in F igs.'1 and 2, this heat insulating means comprises a strip or layer 24 of asbestos or other heat inulating ma terial which is interposed between each of the wearing plates 16, 17 and 22 and their sup ports.

The horizontal portions of the angle irons at the upper margins of each. girder are rovided With upturnedflanges 26 between w ich the layer of insulating material is placed, the flanges 26 serving to hold the longitudinal edges of the layer of asbestos in place. In said Fig. 2 bolts 28 are shown securing the wearing plate 22 to the horizontal portions of the angle irons at the top of the girder, the bolts being omitted in Fig. 1. for convenience of illustration.

In the construction illustrated in Fig. 3, a modified wearing plate 30 is provided having a longitudinally extending channel or recess 32 in its under side that is closed by the top surfaceof the supporting girder so as to form an air passage extending longitudinally of the plate and girder. This-construction enables air or other cooling agent to be directed g V i top of the girder are provided with upturned longitudinal edges 84L which are received in a longitudinally extending groove or channel 36 in the under side of a earing plate 38 so as to form an air chamber or passage between the top of the girder and the Wearing plate Which may be used for the same purpose as the air passage in the construction illustrated in Fig. 3, as above described. 7

In all the forms shown, the protecting means prevent undue heat from injuring the supporting structure, so that even When the fire is banked and normal draft cut oil the supporting structure remains relatively cool.

As Will be evident .to those skilled in the art my invention permits of various modifications Without departing from the spirit thereof ortlie scope of the appended claim.

What I claim is:

A tra lin rate ha ng, n combinat n a er e fiiee enate f r th upper w of the grate comprising agirderQa Wearing plate upontvhic h the upper run of the grate slides nio'unted'upon said girder, and a layer of heatinsulating material interposed between said Wearing plateand girder said Wearing plate and girder being so constructed as to extend over the topand bottom sides and'lon gitudinal edges of said layer of heat insulating material.

JOHN VAN BBUNT- 

